Oil seal



May 18, 1937. 1-. NELSON on. SEAL Filed March 4, 1936 INVENTOR. 7Za22z4sZkn 42ifi/sa2z BY Z I ATTORNEY.

Patented May 18, 1931 2,680,669

unlrso srarss PATENT GFFlCE OIL SEAL Thomas Edward Nelson, Pontiac, Mich. Application March 4, 1936, Serial No. 67,607 2 Claims. (Cl. 286-41) This invention relates to oil seals and the object and the hub 9 or a fan belt pu y i9 is Positioned of the invention is to provide an oil seal which O he Shaft 5 d is SeCllTed thereto y the is mounted to rotate with a rotatable member and H s w in F The retainer 1 is Positioned arranged to provide a seal against a flat face to e h ha 8 against the nd f t hub 9 5 prevent oil leakage. and an annular spacer i2 is also positioned over 5 Another object of the invention is to provide the shaft so a the retainer l is held in lo an i e l comprising a resilient packin ring sition between the hub 9 of the fan belt pulley and held n angular position and provided ith the spacer l2. A member 53 is also positioned wave spring to maintain the free edge of th over and keyed to the shaft 8 and engages against lo packing ring in contact with a surface to be sealed. the u d 14 pr v d d n th shaft 8. A Wash- 10 A further object of the invention is to provide is P d engaging t nd o t hub an oil seal comprising a sheet metal retainer, a 9 d a nut i1 m y b turned p to tim packing ring secured in the retainer and a wave members 9, l2 a d 13 wa d t ht of F 1 spring urging the packing ring i to engagement into firm engagement with the shoulder 14 on 15 with the stationary surface. the shaft 8. 15 Another object of the invention is to provide y s arran m nt th r tainer i s u an oil seal for retaining the oil within a housto rotate with the Shaft 3 and is provided With ing, the arrangement being such that the oil seal notch through Which the y N extends- A prevents leakage along the rotating memb d housing 18 is provided as shown in Fig. 1 and 30 also prevents leakage between the oil seal and this housing i3 is formed with an g l flange go the stationary housing. 19 extending transversely to the axis of the shaft A further object of the invention is to pro- 8 but t of contact wit the pu ey hub 9 as vide an annular retainer provided with an angu- Shown in The W Spring 1 orc s the lar channel at the edge in which the resilient g 5 0 the left of Figs. .1 and 2 thus forcing packing or washer is held, said angular channel h si t a r t firm n a m nt w h 25 being so positioned as t r ain t of t t the flange 19 of the housing 18 and it will be with the stationary housing and, at the same noted that the inturned edge 5 of the resilient time, allow the packing washer to be held in conwasher 4 fi tightly about the member 9 end tact with the housing by a wave spring. prevents leakage between the washer and said These objects and the several novel features of member As the shaft is rotated the oil seal 30 the invention are hereinafter more fully described is rotated in Contact with the flange and y and claimed and the preferred form of construca s of the w v spring 1 a t ht oil s al is pr tion by which these objects are attained is shown Vided at the line Shown in 2. The Wave in the accompanying drawing i wh h spring I allows the resilient washer 4 to conform as Fig. 1 is a section through a fan belt pulley and to the surface of the flange l9 and, at the some housing showing the oil seal as used therewith. time, ma ns the washer in p p y eldi Fig. 2 is an enlarged section through the oil contact w t t e f a e It, The were sprin 1 seal and adjacent members, also allows for slight variation in position of the Fig. 3 is a section taken on line 3-3 of Fig. 1. flange N in relation to theoil seal without afiect- 4c The oil seal is shown more articularl in Fig. 2 ing the sealing action between the resilient Washer 40 and comprises an annular sheet metal retainer l the fl having a flange 2 and provided at the edge of the F m th foregoing d s ription it e om s viflange 2 with a channel 3 which extends at an dent that the device is very simple and efliclent angle to the plane of-the retainer. Secured in in operation, will not easily get out of order, is the channel 3 is a resilient washer 4 which may be composed of low parts and is of consequent low 45 formed of leather, cork, asbestos, laminated fabmanufacturing cost and provides a device which ric or other suitable material. This washer 4 is accomplishes theobjects described. provided with an aperture in the center and with Having thus fully described my invention, its an inturned an a e e 5 o t the ce a tility and mode of operation, what I claim and 60 aperture. Asheet metal ring 6 is positioned withsin; to s cure by Letters Patent of the United in the washer 4 and an annular wave spring 1 stat s i is Positioned in h r n r 1 and engages the 1. In an oil seal, the combination with a ror 5 to force t w r ly. tary member and a stationary member having a In use, the retainer l is provided with a cenface extending in a plane transverse to the axis tra ap through which the Shaft 6 tends of the rotary member, a cup-shaped sheet metal 55 retainer secured to the rotary member, an annular channel formed in the outer edge of the cupshaped retainer and extending at an angle to the plane of theretainer, a resilient washer secured in the channel and extending at an angle to the plane of the retainer and-into contact with the face of the stationary member, the resilient washer being provided with an aperture at the cup-shaped retainer ring and cup-shaped retainer, the

member and a stationary face to be sealed, of a secured to the rotary member in spaced relation with said face, an annular channel formed in the outer edge of said cupshaped retainer and extending at an angle to the axis of the rotary member, a resilient. washer seeuredinthechannelandextendingatanangle into engagement with the face to be sealed, the portion of the washer in contact with said face extending transversely to the axis-of the rotary member, the inner edge of said resilient washer being intumed in engagement with the periphery of the rotary member, a ring fitting about said lntumed edge and a wave spring between said wave spring urging the resilient washer into engagement with said face.

THOMAS EDWARD NELSON. 

